通过双牺牲模板法合成了以一维管状Mn3O4-C为催化剂载体的新型Pt基电催化剂.催化剂的表面形貌、晶体结构及其组成分别采用透射电镜、X射线衍射仪、能量散射X射线光谱进行表征.通过循环伏安法对Pt-Mn3O4-C复合物的电化学性能进行了测试.结果表明平均粒径为1.8 nm的Pt纳米颗粒均匀分散在管式Mn3O4-C载体上,与商业的E-TEK Pt/C催化剂(20%(w,质量分数) Pt)相比, Pt-Mn3O4-C对甲醇氧化有更好的电催化活性和更高的稳定性. Pt纳米粒子在Mn3O4-C上的均匀分散及Pt和Mn3O4的协同催化效应使得Pt-Mn3O4-C具有优异的性能.%A new Pt-based electrocatalyst with one-dimensional tubular Mn3O4-C as the catalyst support was synthesized by a dual-sacrificial template strategy. The morphology, structure, and composition of the Pt-Mn3O4-C composite were characterized by transmission electron microscopy, X-ray diffraction, and energy dispersive X-ray spectroscopy, respectively. The electrochemical performance of Pt-Mn3O4-C was investigated by cyclic voltammetry. The results show that Pt nanoparticles with an average size of 1.8 nm are uniformly dispersed on tubular Mn3O4-C, and Pt-Mn3O4-C exhibits superior electrocatalytic activity and higher stability for methanol oxidation than the commercial E-TEK Pt/C catalyst (20%(w, mass fraction) Pt). The excel ent performance of Pt-Mn3O4-C is attributed to the uniform dispersion of Pt nanoparticles on Mn3O4-C and the synergetic catalytic effect of Pt and Mn3O4.
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